Abstract: To effectively improve realistic and efficiency of visualization of wheat population, a real-time rendering algorithm based on multi-technology integration was developed for visualization of wheat population growth. Firstly, based on the rule of morphological formation of wheat population, differences between individual architectures in population were analyzed. Secondly, in order to improve rendering efficiency, level of detail (LOD) model was adopted, space dividing and selection of level of detail were decided by sight position, sight angle and sight line. View frustum culling was used to reduce the number of detecting point and improve speed of sigle point culling. Tree-structure display list was used to improve data strcture design. Thirdly, external reference and instance technology was used to improve realistic of visualization by generate several diffferent samples which would be used when wheat population were rendering. Finally, a simulation experiments for comparison showed that the rendering algorithm based on multi-technology integration improved efficiency of real-time visualization of wheat population, reduced memory requirement, the techologies for visualization of wheat population growth had a good performance on dynamic and realistic characteristics. These results are helpful for development of a visualization wheat growth system.